Isonoe (moon)
Isonoe imaged by the Canada-France-Hawaii Telescope in December 2001 | |
| Discovery[1] | |
|---|---|
| Discovered by | Scott S. Sheppard David C. Jewitt Yanga R. Fernandez Eugene A. Magnier |
| Discovery site | Mauna Kea Observatory |
| Discovery date | 23 November 2000 |
| Designations | |
Designation | Jupiter XXVI |
| Pronunciation | /aɪˈsɒnoʊ.iː/ |
Named after | Ισονόη Isonoē |
| S/2000 J 6 | |
| Adjectives | Isonoean /ˌaɪsənoʊˈiːən/ |
| Orbital characteristics[2] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Observation arc | 24 years 2024-12-03 (last obs) |
| 0.1559024 AU (23,322,670 km) | |
| Eccentricity | 0.2263119 |
| –688.61 d | |
| 148.53423° | |
| 0° 31m 36.216s / day | |
| Inclination | 164.45891° (to ecliptic) |
| 203.99552° | |
| 219.75296° | |
| Satellite of | Jupiter |
| Group | Carme group |
| Physical characteristics[3] | |
| 4 km | |
| Albedo | 0.04 (assumed) |
Spectral type | D [4] |
| 22.5[5] | |
| 15.9 (82 obs)[6] | |
Isonoe /aɪˈsɒnoʊ.iː/, also known as Jupiter XXVI, is a little retrograde irregular satellite of Jupiter.
Discovery and Naming
It was discovered by a team of astronomers from the University of Hawaiʻi led by Scott S. Sheppard in 2000, and given the temporary designation S/2000 J 6.[7][1]
It was named in October 2002 after Isonoe, one of the Danaïdes in Greek mythology, and a lover of Zeus (Jupiter).[8]
Orbit
Isonoe orbits Jupiter at an average distance of 23,322,670 km in 691,62 days, at an inclination of 165° to the ecliptic, in a retrograde direction and with an eccentricity of 0.226.
It belongs to the Carme group, made up a tightly of irregular retrograde moons orbiting Jupiter at a distance ranging between 22.7–23.5 million km, at an inclination of about 165°, and eccentricities between 0.24 and 0.28.
Physical characteristics
Isonoe' estimated diameter is 4 kilometers, assuming an albedo of 4%.
Like the other members of the Carme group (Exception Kalyke) it is light red in color (B–V = 0.78 ± 0.05, V–R = 0.53 ± 0.04),[4] similar to D-type asteroids.
Origin
Isonoe probably did not form near Jupiter but was captured by Jupiter later.Like the other members of the Carme group, which have similar orbits, Isonoe is probably the remnant of a broken, captured heliocentric asteroid.
References
- ^ a b MPEC 2001-A28: S/2000 J 2, S/2000 J 3, S/2000 J 4, S/2000 J 5, S/2000 J 6 2001 January 5 (discovery and ephemeris)
- ^ "M.P.C. 115890" (PDF). Minor Planet Circular. Minor Planet Center. 27 August 2019.
- ^ "Planetary Satellite Physical Parameters". Jet Propulsion Laboratory. 19 February 2015. Retrieved 27 November 2020.
- ^ a b Graykowski, Ariel; Jewitt, David (5 April 2018). "Colors and Shapes of the Irregular Planetary Satellites". The Astronomical Journal. 155 (4): 184. arXiv:1803.01907. doi:10.3847/1538-3881/aab49b. ISSN 1538-3881.
- ^ Sheppard, Scott. "Scott S. Sheppard - Jupiter Moons". Department of Terrestrial Magnetism. Carnegie Institution for Science. Retrieved 27 November 2020.
- ^ MPC Natural Satellites (Select: Orbital Elements)
- ^ IAUC 7555: Satellites of Jupiter Archived 2002-09-16 at the Wayback Machine 2001 January 5 (discovery)
- ^ IAUC 7998: Satellites of Jupiter 2002 October 22 (naming the moon)